Danielle D’Auria, Maine wildlife biologist, will be giving a presentation on the Great Blue Heron at Merryspring Nature Center. D’Auria is a wildlife biologist who works in the Bird Group of the Maine Department of Inland Fisheries and Wildlife. Admission to the Tuesday Talks is free to Merryspring members and children. There is a $5 charge for non-members. FMI: 236-2239, merryspring.org.